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Low-copy nuclear data confirm rampant allopolyploidy in the cystopteridaceae (Polypodiales)

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Date
2014-10-01
Authors
Rothfels, CJ
Johnson, AK
Windham, MD
Pryer, KM
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Abstract
© International Association for Plant Taxonomy (IAPT) 2014. Here we present the first nuclear phylogeny for Cystopteridaceae (Polypodiales), using the single-copy locus gapCp “short”. This phylogeny corroborates broad results from plastid data in demonstrating strong support for the monophyly of the family’s three genera—Cystopteris, Acystopteris, and Gymnocarpium—and of the major groups within Cystopteris (C. montana, the sudetica and bulbifera clades, and the C. fragilis complex). In addition, it confirms the rampant hybridization (allopolyploidy) that has long been suspected within both Cystopteris and Gymnocarpium. In some cases, these data provide the first DNA-sequence-based evidence for previous hypotheses of polyploid species origins (such as the cosmopolitan G. dryopteris being an allotetraploid derivative of the diploids G. appalachianum and G. disjunctum). Most of the allopolyploids, however, have no formal taxonomic names. This pattern is particularly strong within the C. fragilis complex, where our results imply that the eight included accessions of “C. fragilis” represent at least six distinct allopolyploid taxa.
Type
Journal article
Subject
Science & Technology
Life Sciences & Biomedicine
Plant Sciences
Evolutionary Biology
amplicon cloning
Cystopteris fragilis
fern phylogeny
Gymnocarpium
hybridization
reticulate evolution
species complex
RETICULATE EVOLUTION
NORTH-AMERICAN
MORPHOLOGICAL EVOLUTION
COMPLEX
DRYOPTERIDACEAE
ORIGINS
PTERIDOPHYTA
CHROMOSOME
FERNS
DNA
Permalink
https://hdl.handle.net/10161/21758
Published Version (Please cite this version)
10.12705/635.32
Publication Info
Rothfels, CJ; Johnson, AK; Windham, MD; & Pryer, KM (2014). Low-copy nuclear data confirm rampant allopolyploidy in the cystopteridaceae (Polypodiales). Taxon, 63(5). pp. 1026-1036. 10.12705/635.32. Retrieved from https://hdl.handle.net/10161/21758.
This is constructed from limited available data and may be imprecise. To cite this article, please review & use the official citation provided by the journal.
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Scholars@Duke

Pryer

Kathleen M. Pryer

Professor of Biology
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